Global Research on Atmospheric Chemistry and the Environment

对大气中微量气体的全球分布进行精确建模，对于了解控制辐射和化学重要气体全球收支的源和汇（化学的、物理的或生物的）是必要的。这项工作继续进行全球大气组成理论模拟的基础研究。首先，将研究如何改进全球三维模型中的物理/化学过程（例如，化学、输运和扩散）与用于计算示踪剂输运的高阶数值方法相结合的方式。其次，利用目前平流层臭氧三维化学传输模式（CTM）的研究进展，研究平流层-对流层交换如何控制对流层上层O3和NOy的丰度。

Accurate modelling of the global distribution of trace gases in the atmosphere is necessary to understand the sources and sinks (chemical , physical or biological) that control the global budgets of the radiatively and chemically important gases. This effort continues the basic studies in theoretical modeling of the global composition of the atmosphere. First an investigation of how to improve the manner in which the physical / chemical process in global 3-D models (e.g., chemistry, transport and diffusion) are coupled with the high-order numerical methods used in calculating the transport of tracers, will be undertaken. Second, the developments of current research on three-dimensional chemical transport models (CTM) for stratospheric ozone will be used to examine how stratosphere-troposphere exchange controls the abundances of O3 and NOy in the upper troposphere.